000
AXPZ20 KNHC 300305
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON APR 30 2012

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH 07N90W TO LOW PRES NEAR 05N103W 1008 MB TO 
04N110W...THEN ITCZ TO 06N119W TO 02N140W. SCATTERED MODERATE TO 
STRONG CONVECTION WAS NOTED WITHIN 120 NM OF AXIS BETWEEN 90W 
AND 107W. ISOLATED MODERATE CONVECTION WAS NOTED WITHIN 120 NM N 
OF AXIS BETWEEN 115W AND 133W. 

...DISCUSSION...
HIGH PRES 1033 MB IS CENTERED NEAR 33N147W WITH RIDGE EXTENDING 
SE TO NEAR 19N111W. THE PRESSURE GRADIENT BETWEEN THIS FEATURE 
AND LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS MAINTAINING 
FRESH TO STRONG TRADEWINDS FROM 08N TO 20N W OF 130W. THE 
PRESSURE GRADIENT BETWEEN THE AREA OF HIGH PRESSURE AND 
TROUGHING OVER THE SW UNITED STATES IS MAINTAINING FRESH TO 
STRONG N TO NE WINDS W OF LINE 30N122W TO 20N132W AS DEPICTED BY 
THE LATEST ASCAT PASS. THE AREA OF HIGH PRESSURE WILL SLOWLY 
WEAKEN OVER THE NEXT COUPLE OF DAYS. THIS WILL DECREASE THE 
COVERAGE OF FRESH TO STRONG WINDS ACROSS THIS AREA COVERING THE 
AREA FROM 20N TO 27N W OF 130W BY TUE NIGHT.

E OF 110W...GENTLE TO MODERATE BREEZE AND SEAS BELOW 8 FT ARE 
NOTED WITH CROSS EQUATORIAL SW SWELL WITH PERIODS IN THE 13-15 
SECOND RANGE. LITTLE CHANGE TO THIS SYNOPTIC WEATHER PATTERN IS 
EXPECTED THROUGH TUE NIGHT. 

$$
AL